1、查看现有池
[root@ceph-client ~]# ceph osd lspools
0 rbd,
注意：另创建的pool name不可含有特殊字符，如“-”等
2、查看当前目录文件
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[root@ceph-client mnt]# df -Th | grep rbd
/dev/rbd0 ext4 20G 44M 19G 1% /mnt
[root@ceph-client mnt]# ll
total 16
drwx------ 2 root root 16384 Feb 26 18:32 lost+found
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3、创建image快照
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[root@ceph-client mnt]# rbd ls
foo
列出rbd池中的image
[root@ceph-client mnt]# rbd snap create rbd/foo@foo_snap1
命令模式：rbd/foo@foo_snap1代表rbd池中foo镜像，快照取名foo_snap1
[root@ceph-client mnt]# rbd snap ls rbd/foo
SNAPID NAME SIZE
2 foo_snap1 20480 MB
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4、测试快照
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[root@ceph-client mnt]# touch test{1..5}.file
[root@ceph-client mnt]# ll
total 16
drwx------ 2 root root 16384 Feb 26 18:32 lost+found
-rw-r--r-- 1 root root 0 Feb 29 12:45 test1.file
-rw-r--r-- 1 root root 0 Feb 29 12:45 test2.file
-rw-r--r-- 1 root root 0 Feb 29 12:45 test3.file
-rw-r--r-- 1 root root 0 Feb 29 12:45 test4.file
-rw-r--r-- 1 root root 0 Feb 29 12:45 test5.file
回滚快照
需要先卸载rbd挂载
[root@ceph-client ~]# umount /mnt/
[root@ceph-client ~]# rbd unmap /dev/rbd0
执行回滚
[root@ceph-client ~]# rbd snap rollback rbd/foo@foo_snap1
Rolling back to snapshot: 100% complete...done.
重新挂载
[root@ceph-client ~]# rbd map rbd/foo
/dev/rbd0
[root@ceph-client ~]# mount /dev/rbd0 /mnt/
[root@ceph-client ~]# ll /mnt/
total 16
drwx------ 2 root root 16384 Feb 26 18:32 lost+found
验证成功
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5、删除快照
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[root@ceph-client ~]# rbd snap rm rbd/foo@foo_snap1
删除指定快照
[root@ceph-client ~]# rbd snap purge rbd/foo
删除所有快照
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如果删除时报错“librbd: removing snapshot from header failed: (16) Device or resource busy”
执行如下：
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[root@ceph-admin ~]# rbd snap ls images/9e196534-03e3-484f-bfab-764ef336d82a
SNAPID NAME SIZE
2 snap 12047 kB
[root@ceph-admin ~]# rbd snap rm images/9e196534-03e3-484f-bfab-764ef336d82a@snap
rbd: snapshot 'snap' is protected from removal.
2016-03-21 10:44:34.359028 7f155ac527c0 -1 librbd: removing snapshot from header failed: (16) Device or resource busy
[root@ceph-admin ~]# rbd snap unprotect images/9e196534-03e3-484f-bfab-764ef336d82a@snap
[root@ceph-admin ~]# rbd snap rm images/9e196534-03e3-484f-bfab-764ef336d82a@snap
[root@ceph-admin ~]# rbd snap ls images/9e196534-03e3-484f-bfab-764ef336d82a
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